This is the only canon puzzle (Dragonborn DLC - Kolbjorn Barrow) that's so obscure that I doubt the vast majority of players have solved without Google : r/skyrim
Skyrim:Folgunthur - The Unofficial Elder Scrolls Pages (UESP)
Monthly Modder: Dafydd1
Skyrim: Geirmund's Hall Turn-Stone Puzzle Puzzle - Orcz.com, The Video Games Wiki
How many of you loot every one of these little guys? : r/ElderScrolls
Talk:Folgunthur | Elder Scrolls | Fandom
Skyrim: Geirmund's Hall Turn-Stone Puzzle Puzzle - Orcz.com, The Video Games Wiki
Forbidden Legend - The Elder Scrolls V: Skyrim Wiki Guide - IGN